package org.atguigu.gmall.realtime.app.dws;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.common.state.ValueState;
import org.apache.flink.api.common.state.ValueStateDescriptor;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.KeyedProcessFunction;
import org.apache.flink.streaming.api.functions.ProcessFunction;
import org.apache.flink.streaming.api.functions.windowing.ProcessAllWindowFunction;
import org.apache.flink.streaming.api.windowing.assigners.TumblingEventTimeWindows;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.util.Collector;
import org.atguigu.gmall.realtime.app.BaseApp;
import org.atguigu.gmall.realtime.bean.TradeOrderBean;
import org.atguigu.gmall.realtime.common.Constant;
import org.atguigu.gmall.realtime.util.AtguiguUtil;
import org.atguigu.gmall.realtime.util.FlinkSinkUtil;

import java.time.Duration;
import java.util.Objects;

/**
 * Project:gmallRealTime
 * Package:org.atguigu.gmall.realtime.app.dws
 * Author: ZengHaiFeng
 * CreateTime:2023/5/5 08:16:05
 * Description: Todo
 * Version：1.0
 */
public class Dws_08_DwsTradeOrderWindow extends BaseApp {
    public static void main(String[] args) {
        new Dws_08_DwsTradeOrderWindow()
                .init(40008,2,
                        Constant.TOPIC_DWD_TRADE_ORDER_DETAIL,"Dws_08_DwsTradeOrderWindow");
    }
    @Override
    public void handle(StreamExecutionEnvironment env, DataStreamSource<String> ds) {
        ds.map(JSON::parseObject)

                .assignTimestampsAndWatermarks(
                        WatermarkStrategy
                                .<JSONObject>forBoundedOutOfOrderness(Duration.ofSeconds(3))
                                .withTimestampAssigner((obj,ts) -> obj.getLong("ts")*1000)
                                .withIdleness(Duration.ofSeconds(60))
                )
                .keyBy(value -> value.getString("user_id"))
                .process(new KeyedProcessFunction<String, JSONObject, TradeOrderBean>() {
                    private ValueState<String> lastOrderDateState;

                    @Override
                    public void open(Configuration parameters) throws Exception {
                        lastOrderDateState = getRuntimeContext().getState(
                                new ValueStateDescriptor<>("lastOrderDate",
                                        String.class)
                        );
                    }

                    @Override
                    public void processElement(JSONObject value, KeyedProcessFunction<String, JSONObject, TradeOrderBean>.Context ctx, Collector<TradeOrderBean> out) throws Exception {
                        String lastOrderDate = lastOrderDateState.value();
                        Long ts = value.getLong("ts")*1000;
                        String today = AtguiguUtil.tsToDate(ts);
                        Long orderNewUserCount = 0L;
                        Long orderUniqueUserCount = 0L;

                        if (lastOrderDate == null){
                            orderNewUserCount = 1L;
                            orderUniqueUserCount = 1L;
                        }else {
                            if (!today.equals(lastOrderDate)){
                                orderUniqueUserCount = 1L;
                            }
                        }
                        lastOrderDateState.update(today);
                        out.collect(new TradeOrderBean("","",
                                orderUniqueUserCount,orderNewUserCount,ts));
                    }
                }).windowAll(TumblingEventTimeWindows.of(Time.seconds(5)))
                .reduce(new ReduceFunction<TradeOrderBean>() {
                    @Override
                    public TradeOrderBean reduce(TradeOrderBean value1, TradeOrderBean value2) throws Exception {
                        value1.setOrderUniqueUserCount(value1.getOrderUniqueUserCount() + value2.getOrderUniqueUserCount());
                        value1.setOrderNewUserCount(value1.getOrderNewUserCount() + value2.getOrderNewUserCount());
                        return value1;
                    }
                }, new ProcessAllWindowFunction<TradeOrderBean, TradeOrderBean, TimeWindow>() {
                    @Override
                    public void process(
                            Context context,
                            Iterable<TradeOrderBean> elements,
                            Collector<TradeOrderBean> out) throws Exception {
                        TradeOrderBean bean = elements.iterator().next();
                        bean.setStt(AtguiguUtil.tsToDateTime(context.window().getStart()));
                        bean.setEdt(AtguiguUtil.tsToDateTime(context.window().getEnd()));
                        bean.setTs(System.currentTimeMillis());
                        out.collect(bean);
                    }
                })
                .addSink(FlinkSinkUtil.getClickHouseSink(
                        "dws_trade_order_window",
                        TradeOrderBean.class
                ));
    }
}
